Just a quick idea to share
Have you think of using hemp as clothing materials
My friend and i may do some research on using hemp materials for martial arts uniforms & other uses
i am in the taiwan martial arts club
USA maybe a cheap material producing country/something to think about

If i didn't have to travel & move so much/moved 23 times and counting
i would go to Dhh native wild location & collect 10 adult pairs
and go back collect some more every few years or so
That is if you really into this species

It seems the larger the beetle the higher the chance of curved horn but there are ways to decrease the risk
im not specialized in rhinoceros beetles
What i can do is offer you phone assistance if need to when im in taiwan
Or we can trade for things